N98\Magento\DbSettingsTest::arrayAccess PHP Method

    public function arrayAccess()
    {
        $file = __DIR__ . '/local.xml';
        $settings = new DbSettings($file);
        $this->assertSame('user', $settings['username']);
        $this->assertSame('pass', $settings['password']);
        // unix_socket should be NULL
        $this->assertNull($settings['unix_socket']);
        // it's still leaky:
        $this->assertInstanceOf('SimpleXMLElement', $settings['pdoType']);
    }